#define ECHO_PIN 18
#define TRIG_PIN 5
#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6XiFCbUlj"
#define BLYNK_TEMPLATE_NAME "BIN Controller"
#define BLYNK_AUTH_TOKEN "PxX_NeXCUymaHGs4jK4GEgrmoXt_RoXY"

#include <WiFi.h>
#include <WiFiClient.h>
#include "ThingSpeak.h" // always include thingspeak header file after other header files and custom macros
#include <BlynkSimpleEsp32.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
float distance;
unsigned long myChannelNumber = 2351651;
const char *myWriteAPIKey = "YZLUJ97SB1THB187";

WiFiClient  client;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  ThingSpeak.begin(client);  // Initialize ThingSpeak
}


void condition()
{
  if (distance <= 20)
  {
    Blynk.virtualWrite(V0, 1);
    Blynk.virtualWrite(V1, 0);
    Blynk.virtualWrite(V2, 0);
  }
  else if (distance <= 69)
  {
    Blynk.virtualWrite(V0, 0);
    Blynk.virtualWrite(V1, 1);
    Blynk.virtualWrite(V2, 0);
  }
  else
  {
    Blynk.virtualWrite(V0, 0);
    Blynk.virtualWrite(V1, 0);
    Blynk.virtualWrite(V2, 1);
  }
  Blynk.virtualWrite(V3, distance);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}
void loop() {
  Blynk.run();
  distance = readDistanceCM();
  Serial.print("Jarak : ");
  Serial.println(distance);
  condition();
  int x;
  while (x != 200) {
    x = ThingSpeak.writeField(myChannelNumber, 1, distance, myWriteAPIKey);
    delay(50);
  }
  Serial.println("Channel update successful.");
  delay(100);
}